syzkaller login: [ 30.540747] BUG: Bad rss-counter state mm:00000000c656e654 type:MM_FILEPAGES val:33 [ 30.542760] BUG: Bad rss-counter state mm:00000000c656e654 type:MM_ANONPAGES val:22 [ 30.714170] ================================================================== [ 30.715318] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.716518] Read of size 8 at addr ffff888019c194e0 by task sshd/218 [ 30.717544] [ 30.717809] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.718891] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.719913] Call Trace: [ 30.720240] [ 30.720530] dump_stack_lvl+0x91/0xf0 [ 30.721035] print_report+0xcc/0x620 [ 30.721516] ? __virt_addr_valid+0x102/0x340 [ 30.722075] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.722718] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.723337] kasan_report+0xbe/0xf0 [ 30.723816] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.724446] vma_interval_tree_remove+0xc75/0xec0 [ 30.725062] vma_prepare+0xc54/0x11a0 [ 30.725551] __split_vma+0x5af/0x950 [ 30.726033] ? __pfx___split_vma+0x10/0x10 [ 30.726576] ? find_held_lock+0x2c/0x110 [ 30.727104] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.727694] ? lock_is_held_type+0x9f/0x120 [ 30.728240] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.728857] ? mtree_range_walk+0x632/0x900 [ 30.729416] ? mas_walk+0x5c7/0x7c0 [ 30.729907] do_vmi_munmap+0x1f1/0x2b0 [ 30.730435] mmap_region+0x1f9/0x2660 [ 30.730928] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.731458] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.732188] ? __pfx_lock_acquire+0x10/0x10 [ 30.732735] ? __pfx_mmap_region+0x10/0x10 [ 30.733292] ? security_mmap_addr+0x7d/0xa0 [ 30.733837] ? get_unmapped_area+0x1f5/0x3f0 [ 30.734400] do_mmap+0x854/0xf00 [ 30.734844] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.735342] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.735916] ksys_mmap_pgoff+0x3af/0x500 [ 30.736428] do_syscall_64+0x3f/0x90 [ 30.736912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.737568] RIP: 0033:0x7f1217e4ed82 [ 30.738028] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 30.740206] RSP: 002b:00007ffd9fee1d98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.741118] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1217e4ed82 [ 30.741959] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1217288000 [ 30.742825] RBP: 00007f1217288000 R08: 0000000000000009 R09: 0000000000001000 [ 30.743681] R10: 0000000000000812 R11: 0000000000000206 R12: 00005649d0be0b20 [ 30.744528] R13: 00007ffd9fee1db0 R14: 00007ffd9fee1de0 R15: 00007ffd9fee2140 [ 30.745388] [ 30.745682] [ 30.745895] Allocated by task 211: [ 30.746339] kasan_save_stack+0x22/0x50 [ 30.746844] kasan_set_track+0x25/0x30 [ 30.747337] __kasan_slab_alloc+0x59/0x70 [ 30.747860] kmem_cache_alloc+0x16b/0x370 [ 30.748371] vm_area_dup+0x20/0x160 [ 30.748821] __split_vma+0x170/0x950 [ 30.749288] split_vma+0xc6/0x110 [ 30.749724] mprotect_fixup+0x8d2/0xb30 [ 30.750274] do_mprotect_pkey+0x87e/0xd40 [ 30.750904] __x64_sys_mprotect+0x78/0xc0 [ 30.751538] do_syscall_64+0x3f/0x90 [ 30.752114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.752891] [ 30.753152] Freed by task 211: [ 30.753628] kasan_save_stack+0x22/0x50 [ 30.754246] kasan_set_track+0x25/0x30 [ 30.754844] kasan_save_free_info+0x2b/0x50 [ 30.755482] __kasan_slab_free+0x10a/0x190 [ 30.756136] kmem_cache_free+0x10d/0x4d0 [ 30.756752] rcu_core+0x8c8/0x2860 [ 30.757292] __do_softirq+0x1b7/0x7d4 [ 30.757869] [ 30.758191] Last potentially related work creation: [ 30.758918] kasan_save_stack+0x22/0x50 [ 30.759530] __kasan_record_aux_stack+0x8e/0xa0 [ 30.760230] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.761001] remove_vma+0x139/0x170 [ 30.761553] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.762256] do_vmi_munmap+0x1f1/0x2b0 [ 30.762851] __vm_munmap+0x138/0x3a0 [ 30.763415] __x64_sys_munmap+0x59/0x80 [ 30.764020] do_syscall_64+0x3f/0x90 [ 30.764604] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.765386] [ 30.765644] The buggy address belongs to the object at ffff888019c19488 [ 30.765644] which belongs to the cache vm_area_struct of size 168 [ 30.767419] The buggy address is located 88 bytes inside of [ 30.767419] freed 168-byte region [ffff888019c19488, ffff888019c19530) [ 30.769094] [ 30.769349] The buggy address belongs to the physical page: [ 30.770145] page:0000000062686639 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c19 [ 30.771458] memcg:ffff88800f758601 [ 30.771969] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.772740] page_type: 0xffffffff() [ 30.773273] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.774397] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f758601 [ 30.775478] page dumped because: kasan: bad access detected [ 30.776263] [ 30.776517] Memory state around the buggy address: [ 30.777205] ffff888019c19380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.778234] ffff888019c19400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.779259] >ffff888019c19480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.780283] ^ [ 30.781188] ffff888019c19500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.782197] ffff888019c19580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.783226] ================================================================== [ 30.784370] Disabling lock debugging due to kernel taint [ 33.676715] BUG: Bad rss-counter state mm:000000001e284fef type:MM_FILEPAGES val:33 [ 33.678388] BUG: Bad rss-counter state mm:000000001e284fef type:MM_ANONPAGES val:22 [ 34.228990] BUG: Bad rss-counter state mm:00000000da007916 type:MM_FILEPAGES val:33 [ 34.230102] BUG: Bad rss-counter state mm:00000000da007916 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36460' (ECDSA) to the list of known hosts. 2023/06/21 07:45:32 fuzzer started 2023/06/21 07:45:33 dialing manager at localhost:36067 2023/06/21 07:45:33 checking machine... 2023/06/21 07:45:33 checking revisions... [ 34.857218] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:45:33 testing simple program... [ 34.898449] cgroup: Unknown subsys name 'net' [ 34.950298] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:45:32 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffffffff85d98e88 RCX=ffffffff8118ddc2 RDX=0000000000000000 RSI=ffffffff860a1416 RDI=ffffffff85d98e78 RBP=ffffffff85d98e78 RSP=ffff88806ce099b8 R8 =ffffffff860a1416 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000000792d R12=ffffffff85d98e9c R13=ffffffff85d98e78 R14=ffffffff85d98e78 R15=dffffc0000000000 RIP=ffffffff8112fc8c RFL=00000206 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f836d166900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f836d71b650 CR3=000000000e4cc000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=0000000000000000000000000000ffff XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=6120776f6c6c6120746f6e206f740000 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fbb0584f5e0 CR3=0000000009728000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=10917609c3f59582df40bc615429e3f9 XMM02=0000000000119ff0eff9b2d0a8fce9cb XMM03=000000000011a0c02c67c8bc2e329bc3 XMM04=e5a76c419a93164600000000000ae988 XMM05=537013eb993cb76f00000000001321a0 XMM06=bdf2e299e47b49d50000000000130c20 XMM07=fb795ef6d65770560000000000120eb0 XMM08=2c67c8bc2e329bc3000000000011a060 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000